Tiwai Point: Coastal erosion threatening monitoring bores 18 May, 2021 10:29 PM 5 minutes to read By Phil Pennington of RNZ New environmental data at Tiwai Pt aluminium smelter shows sea level rise is destroying bores within scores of metres of where 100,000 tonnes of hazardous waste is stored. Coastal erosion has already shut down one bore used to monitor groundwater for pollution, and threatens to take out a second. These bores are within five metres of sand dunes, a few metres behind which sits 106,000 tonnes of spent cell liner (SCL) waste - which contains cyanide and fluoride - on a giant concrete pad. Advertisement